Results 21 to 30 of about 219,099 (300)
Infinity in string cosmology: A review through open problems [PDF]
, 2016 We review recent developments in the field of string cosmology with particular emphasis on open problems having to do mainly with geometric asymptotics and singularities.
Antoniadis, Ignatios, Cotsakis, Spiros
core +2 more sources
Localization and counting of string tomatoes based on improved Tiny-YOLOv5l algorithm
Shipin yu jixie, 2023 Objective： This study is to improve the sorting efficiency of string tomatoes, and solve its false detection and false detection. Methods: First, collect the image data set of string tomatoes, expand the data and improve the generalization performance of
ZHAO Jiu-xiao +4 more
doaj +1 more source
String threshold corrections from field theory [PDF]
Nuclear Physics B, 2002 A field theory approach to summing threshold effects to the gauge couplings in a two-torus compactification is presented and the link with the (heterotic) string calculation is carefully investigated. We analyse whether the complete UV behaviour of the theory may be described on pure field theory grounds, as due to momentum modes only, and address the ...
Ghilencea, D, Nibbelink, S
openaire +2 more sources
Ringing and echoes from black bounces surrounded by the string cloud
European Physical Journal C: Particles and Fields, 2023 In the string theory, the fundamental blocks of nature are not particles but one-dimensional strings. Therefore, a generalization of this idea is to think of it as a cloud of strings. Rodrigues et al.
Yi Yang +3 more
doaj +1 more source
Excitations of D-strings, Entropy and Duality [PDF]
, 1996 We examine the BPS and low energy non-BPS excitations of the D-string, in terms of open strings that travel on the D-string. We use this to study the energy thresholds for exciting a long D-string, for arbitrary winding number.
't Hooft +37 more
core +2 more sources
Effective String Theory of Vortices and Regge Trajectories of Hybrid Mesons with Zero Mass Quarks [PDF]
, 2001 We show how a field theory containing classical vortex solutions can be expressed as an effective string theory of long distance QCD describing the two transverse oscillations of the string.
Baker, M., Steinke, R.
core +3 more sources
PROBLEMS OF MEASURING OF MOTION PARAMETERS OF THE DRILL STRING
Известия высших учебных заведений: Нефть и газ, 2017 The current methods of measuring of parameters of the movement of the drill string are reviewed. The as-sessment of these methods from the point of view of metrology and the effectiveness of the application of measuring equipment is given.
V. A. Kuznetsov, S. A. Mikheew
doaj +1 more source
The first α′-correction to homogeneous Yang-Baxter deformations using O(d, d)
Journal of High Energy Physics, 2020 We use the O(d, d)-covariant formulation of supergravity familiar from Double Field Theory to find the first α′-correction to (unimodular) homogeneous Yang-Baxter (YB) deformations of the bosonic string.
Riccardo Borsato +2 more
doaj +1 more source
Gauge string in the fermion asymmetric matter [PDF]
, 1999 Two new effects of interaction of the gauge string with a homogeneous density of fermions are considered in a gauge model with an anomalous coupling of vector fields with fermions.
A.A. Kozhevnikov +14 more
core +3 more sources
AdS4/CFT3 from weak to strong string coupling
Journal of High Energy Physics, 2020 We consider the four-point function of operators in the stress tensor multiplet of the U(N) k × U(N) −k ABJM theory, in the limit where N is taken to infinity while N/k 5 is held fixed.
Damon J. Binder +2 more
doaj +1 more source